try backend js

js/app.js

@@ -1,9 +1,11 @@
 const express = require('express');
+const path = require('path');
 const app = express();
 const port = 3000;
 
+// Serve the index.html file at the root URL
 app.get('/', (req, res) => {
-    res.send('Hello from Node.js and Express!');
+    res.sendFile(path.join(__dirname, '../html/index.html'));
 });
 
 app.listen(port, () => {